Stapler mechanical operating mechanism for collators



L. MESTRE 3,

STAPLER MECHANICAL OPERATING MECHANISM FOR GOLLATORS Dec. 7, 1965 5Sheets-Sheet 1 Filed July 22, 1965 zoom z= Q Qu Each LUIS MESTREINVENTOR ATTORNEY.

L. MESTRE 3,221,965

STAPLER MECHANICAL OPERATING MECHANISM FOR COLLATORS Dec. 7, 1965 5Sheets-Sheet 2 Filed July 22, 1963 STAPLER ROLL INVENTOR LUIS MESTRE BY741% ATTORNEY.

L. MESTRE 3,221,965

STAPLER MECHANICAL OPERATING MECHANISM FOR COLLATORS Dec. 7, 1965 5Sheets-Sheet 3 Filed July 22, 1963 RH S w O E N m M m E 5 m T M u M l Ll m m m v n05 Q05 4. 5 Q,\ fiwhalil; l. Fil .lsl. Ii J J: 2 N )E 1. WmHUM 1 s l I m w 9 mz wz 02:95 W @I ".IN P ,vm m W m mz u2 02.0 am

United States Patent 3,221,965 STAPLER MEHAN1AL SPERATlNG MECHA- NISMFGR CGLLATORS Luis Mestre, 3%5 E. 45th St, New York, N.Y. Filed July 22,1963, Ser. No. 296,589 11 Claims. (Cl. 2277) The invention relates to astapler operating mechanism for collators and is particularly designedfor the collator of the Luis Mestre application S.N. 191,141, filed Apr.30, 1962, now Patent 3,108,797 dated Oct. 29, 1963, and S.N. 243,345,filed Dec. 10, 1962. In this collator the sheets of a book are withdrawnfrom storage pockets and transported by belt transporting means in overlapping relation and with their leading edges in spaced relation. Inbetween the ends of the belt transporting means there is provided stopmeans which halt the sheets for a prescribed short time during whichtime the sheets are aligned longitudinally and laterally, the book ofsheets is gaged, and stapled particularly in one corner after which thestop means is depressed and the book passes to the end of thetransporting means and usually deposited on a deposit table. In theevent the gaging means indicates that the book of sheets is too thin,that is it lacks one or more sheets, or too thick, in that it containsone or more duplicate sheets, the book of sheets is rejected, preferablywithout stapling, and passes to a rejection compartment or bin ratherthan to the deposit table. There are times, such as for a short run ofbooks, when it is desirable to use a stapler using formed orpre-fabricated staples. At other times it may be desirable to run alarge quantity of books in which event it is desirable to use a staplerwhich makes it own staples from a spool of wire, the stapler making thestaples as it is used. Both of these types of staplers are purchasableon the market and are well known. Heretofore the staplers as used on acollator have been operated by a solenoid, the operation of which issubject to occasional misses and the power of the solenoid may beinsufficient for full efiicient operation. The mechanism herein is animprovement thereof.

It is an object of the invention to construct a stapling mechanism for acollator located on the transporting means for the sheets between thestorage pockets and a deposit table or platform which stapling mechanismis mechanically operated from the collator.

Another object of the invention is to construct a stapling mechanism fora collator which may use either a stapler using pre-fabricated staplesor a stapler which manufactures each staple as it is used as a part ofthe stapling operation.

Another object of the invention is to construct a stapling mechanism fora collator in which the stapler mech from a spool of wire, the staplermaking the staple as tor.

A further object is to construct a stapler mechanism which operatesthrough a clutch connected with a collator shaft.

A still further object is to construct a stapler mechanism which doesnot operate the stapler when a book of sheets is rejected.

Other objects of the invention will be more apparent from the followingdescription when taken in connection with the accompanying drawingsillustrating a preferred embodiment thereof in which:

FIG. 1 is a side elevation of the drive connection to th stapleroperating lever;

FIG. 2 is an end view of the stapler mechanism of FIG. 1;

FIG. 3 is a top view of a stapler mounted in position on the belttransporting means of the collator and showing the stapler operatinglevers.

ice

FIG. 4 is an enlarged view of the operating lever for operating astapler of the style which manufactures its own staples from a spool ofwires;

FIG. 5 is an enlarged view of the operating lever for use with the styleof stapler which uses formed or prefabricated staples;

FIG. 6 is essentially an electrical circuit diagram of the switches andthe means for controlling the operation of the drive connection for thestapler operating mechanism.

The frame 10 on which the stapling mechanism is mounted is of suitableform and is the frame of the collator or more particularly the frame ofthe sheet transmitting means of the collator. Means is provided as apart of the frame to secure the stapler to the frame which includes astapler mounting ar 11. This bar preferably has graduations to assist inproperly locating the stapler for the particular width of sheets to bestapled. Mounting means is provided on this bar to mount a stapler,which means includes a stapler carriage 12 which is adjustable along thebar to adjust the position of the stapler depending upon the width ofthe sheets S and with respect to the edge of the book of sheets. Thecarriage is secured to the bar such as by being clamped in position onthe bar by a clamp 13 of any suitable kind.

The sheets of the book are momentarily halted by a stop means at whichtime the sheets are aligned longitudinally by the stop means and othermeans and aligned laterally by a jogger means. Also while halted, thebook of sheets is gaged by a pair of gages, as described in theaforesaid application; and if the book is acceptable, the sheets arestapled and the book passes to a deposit table at the end of thetransporting means.

Preferably the stapler is suitably secured to the stapler carriage at anangle by a holding means 14, shown as a channel, so that the staple isapplied at an angle at the adjacent corner of the book although thisposition is not essential. The stapler particularly illustrated is ofthe type which manufactures its own staple as it is used. This staplercarries a stapler operating roll carried by the stapler head which ispressed downwardly in order to operate the stapler.

The staple is operated by stapler lever means which, for the type ofstapler which makes its own staple, includes an operating lever 17, FIG.4. This lever has a stapler operating member 18 secured to the lever andforming a part thereof and providing an operating surface 19. When thestapler is mounted at an angle to the corner of the sheets, thisoperating member is secured at an angle corresponding to, and in orderto accommodate for, the angular position of the stapler. The operatingmember and its inclined lower surface 19 engages the stapler roll andpresses it downwardly in order to operate the stapler. The stapleroperating lever has a hole 26 therethrough to receive the stapleroperating shaft 21. The shaft has a key slot 22 for carrying a key 23(FIG. 5) which key engages in a key slot 24 carried by the operatinglever so that the lever may be adjusted along the operating shaft toposition the lever to operatively engage the stapler in any adjustedposition dependent upon the width of the book sheets to be operated. Abolt 25 secures or clamps the lever in position on the operating shaft.The shaft 21 is propelled to initial position by a spring 15 having oneend secured to a pin 16 carried by the shaft and the other end beingsecured to the frame.

Operating means is provided to oscillate the stapler operating shaft 22in timed sequence with respect to the collator cycle of operation inorder that stapling take place immediately after the book of sheets isgaged. The operating means shown includes a clutch and a linkingconnection between the clutch and the stapler operating shaft 21. Thelinking connection includes a lever 26 secured to the end of the shaft,which lever carries a pin 27. One end of a link 28 is received on thepin 27 and carries a link adjustment means 29 by which the length of thelink may be adjusted. The other end of the link is pivotally mounted ona pin 30 carried by a cam lever 31, which lever is pivotally mounted ona pivot 32 carried by the frame 10 or particularly on a bracket forminga part of the frame. The cam lever includes an arm 33 carrying a camfollower 34 rotatably mounted on a pin 35.

The cam follower engages a cam 36 mounted on a drive shaft 37, which camis secured, such as by bolt means 42, to a driven member 38 of a clutch39. This clutch may be of any suitable construction, however, it is of atype of clutch which rotates the driven member for one revolution onengagement of the clutch and upon completion of one revolution, theclutch is automatically disengaged or released. The clutch also is onewhich functions precisely at high speed. A spring 43 attached at one endto the cam lever retains its cam follower against the cam. The clutch39, when engaged, is driven by a pulley member 40 which is driven by abelt 41 connected with one of the shafts of the collator.

It is immaterial whether the cam 36 and driven member 38 are secured tothe drive shaft 37 and the pulley and driving member 52 are rotatablymounted on the shaft or whether the cam and driven member are rotatablymounted on the shaft and the pulley is secured to the shaft. Asconstructed, the cam and driven member are secured to the drive shaft.The pulley and clutch drives the driven member and the cam through apulley ratio of 6 to 1 at a speed about six times the speed orrevolutions of the cam shaft 59 of the collator which rotates once foreach cycle of operation of the collator. If the speed of the drivingmember 52 were the same as that of the drive shaft Q or once per cycleof the shaft there would be eight notches 52a per cycle to time theoperation of the stapler. With a six to one speed ratio there are, ineffect, 48 notches for each cycle of the collator to time the operationof the stapler. This enables the stapling to take place at precisely theright time immediately after gaging the book of sheets and opening ofnonstop switch 63 if a gage switch 67 or 68 closes and completes thestapling while the sheets are stationary. The operating connectionbetween the driven plate or member of the clutch and the stapler may beby other means rather than a cam but a cam makes it possible to selectthe type and speed of movement to be used.

The clutch particularly shown has a clutch operating lever 46 whichcontrols a driving connection between the driving member 52 and thedriven member 38 of the clutch when the lever is released. Lever 46 ismoved counterclockwise (FIG. 1) to released position and held inreleased position by the pawl spring means 84 pressing the pawl pin 83inwardly against the inclined portion 82 of the lever. Upon release ofthe clutch operating lever, the clutch is engaged to establish a drivingconnection between the pulley of a driving member 52 operativelyconnected therewith, and the driven member 38 and hence the cam.

A clutch control mechanism is provided for releasing and engaging theclutch operating lever. The mechanism shown includes a control lever 47which is pivotally mounted on a pivot 48 carried by the frame to movethe same away from and into engagement with the clutch operating lever.The control lever 47 may have a tongue 49 extending at right angleswhich normally is engaged by the clutch operating lever 46. A stop pin50 limits the movement of the clutch control lever. As will appear morefully hereinafter the clutch uses pawl means including at least one pawl51 and a clutch plate 52 having notches 52a in the periphery thereof.

The control mechanism includes means to operate the clutch control lever47 to release the clutch operating lever 46 and engage the clutch forone revolution. The

lever 46 rotates with the driven member for one revolution of the shaft,and just before completion of one revolution, the clutch engaging leveris engaged by the control lever 4-7 to release or disengage the pawlmeans and hence disengage the clutch. A convenient method of propellingthe clutch control lever away from the clutch operating lever to engagethe clutch is a solenoid 53, the armature 54 of which is operativelyconnected to the control lever by a pin 55.

The clutch drive shaft 37 rotates at a speed which is about six timesthat of the cam shaft 59 of the collator, one rotation of which is onecycle of operation of the controller so that shaft 37 makes onerevolution in a much shorter time than one cycle of operation of thecollator. In the clutch provided there are eight pawl notches 52a whichenables the stapler to be operated at precisely the right time for theshort period in which a book of sheets is held by the stop means ingaging position and after gaging has taken place.

The solenoid S3 is normally operated for each cycle of operation of thecollator and consequently the clutch 39 is normally engaged one for eachcycle of operation of the collator excepting when a book of sheets is tobe rejected by the gaging means. The means for engaging the clutch oncefor each cycle of the collator or particularly for energizing thesolenoid 53 includes a cam 58 secured to the cam shaft 59 of thecollator. This shaft carries other cams for controlling the operation ofthe collator, such as operation of stop means, of sheet aligning meansand the gaging means for the book. The cam 58 closes a switch 60 oncefor each cycle of the operation of the collator. The switch is closedand the clutch is operated immediately after the gaging means hasperformed its gaging of the book of sheets.

Means are provided to render the stapler inoperative in the event a bookof sheets is rejected. With the sheets of a rejected book unstapled, itis easy to separate the sheets and replace them in the proper storagepockets of the collator. This means includes a normally closednonstapler or stapler throwout switch 63 which is in series with theswitch 60 and the clutch solenoid 53, so that when this non-stapleswitch is opened the closing of the stapler switch 60 is ineflective tooperate solenoid 53. The non-staple switch 63 may be operated in anydesirable manner under the control of the gaging means. The control maybe directly from the switch means of the gaging means which includesswitch 67 for a too thin book and a switch 68 for a too thick book.However, a more convenient way of opening the non-staple switch is tolocate the switch adjacent to some part of the mechanism for rejecting abook of sheets. When the gaging means rejects a book it operates a bookreject solenoid 66 which moves a reject member 252 (FIG. 6) to aposition to render operable a book reject mechanism including a rejectdeflector which moves into the path of the book at the end of thetransporting means. When this reject member is moved to reject positionby the reject solenoid, the non-staple switch 63 is opened just beforethe stapler switch 60 is closed and held closed when the latter isclosed so that the circuit for the clutch solenoid 53 remains open andthe solenoid is not energized. The clutch 39 is, therefore, not engagedand the stapling mechanism is not operated. The non-staple switch 63,therefore, as well as the stapler switch 60 and its cam 58, and theclutch solenoid 53 comprise means for controlling the clutch.

The stapler illustrated in FIGS. 1 and 3 is the type which makes its ownstaples from a spool of wire. Such stapler can staple a great many morebooks since the spool of wire is sufficient to make a large number ofstaples. There are times when the collator is to collate a short run ofbooks for which the type of stapler which uses premanufactured staplesmay be used. Both types of staplers are well known. A differentoperating lever, however, is used to operate the type of stapler, usingpremade staples, as illustrated in FIG. 5. A dot-dash line shows theoperating head of this type of stapler. This stapler is secured to thestapler carriage 12 in place of the stapler shown thereon and may besecured at an angle as shown so that the staple will be placed at anangle in the corner of the book.

The operating lever 17 is moved out of the way on the stapler operatingshaft. The stapler operating lever 70 is then shifted on the shaft sothat it is brought into proper position to engage the stapler head, FIG.5, and is clamped in position by the bolt 71. The stapler operatinglever 70 carries a secondary or pivotal operating lever 72, formed oftwo links, pivotally mounted on the lever on a pivot 73 and forming apart of the stapler operating lever. This lever carries a roller 74rotatably mounted on a pin 75, such that the roller is in engagementwith the stapler head. The secondary lever is pressed down by a spring76 surrounding a rod 77 carried by the lever 72 and slidably received bythe lever 78. The reason why the operating lever 70 carries a spring 76is that additional freedom of movement of the operating lever isrequired with this type of stapler. A stapler which uses pre-madestaples, has its own extent of operating movement. In order to avoidprecise extent of movement of the lever 70 to accommodate for thestapler head movement, the lever 72 and roll 74 is pressed downwardly bythe spring 76 so that when the stapler head has reached its limit ofdownward movement, the spring 76 yields or compresses. The spring 76 is,of course, strong enough to overcome the upward spring pressure in thestapler itself to raise the stapler head after stapling. In the staplerof the style illustrated in FIG. 4 the equivalent spring is provided asa part of the stapler itself, and hence a similar spring need not beprovided on the stapler operating lever.

For the stapler which uses the prefabricated staples, the stroke islonger for operating the stapler and therefore, a second link pin 78 isprovided on the lever 26 nearer to the stapler operating shaft 21 toreceive the end of the link 28. With the same link stroke on a shorterradius, the shaft 21 is given a greater movement of oscillation.

As to the details of the clutch 37, particularly illustrated, the clutchoperating lever 46 is oscillatably mounted such as on a clutch part orparticularly on the drive shaft 37 with its movement limited by a limitpin 80 carried thereby and received in a slot 81 in the driven member38. The clutch lever 46 has a pawl lifting portion 82 for each pawl 51of the pawl means which lifting portion engages a lifting pin 83 carriedby the pawl and moves the pawl radially outwardly away from engagementwith notches 52a in the periphery of the clutch plate 52 When in theposition illustrated in FIG. 1. The drawings show a similar liftingportion on the clutch lever on the opposite side for a second pawl, notshown which operates at the same time and in the same manner as the pawl51. When the control lever 47 is raised, the spring 84 presses the pin83 inwardly which presses against the inclined portion 82 to shift theclutch operating lever 46 out of the way. When the limit pin 80 is atthe other end of the limit pin slot 81, the pawl is released and a pawlspring 84 carried by the driven member 38 engages the lifting pin 83 topropel the end of each pawl into a notch 52a and establish the drivingconnection between the driving member or clutch plate 52 and the pawland hence the driven member 38. When the clutch operating lever 47 isreleased as described, it makes one revolution with the driven member ina counterclockwise direction (FIG. 1) whereupon the clutch engaginglever 46 engages the control lever 47 to oscillate the formersufiiciently to raise the pawl means from engagement in the notch ornotches and the clutch is disengaged. It is clear that the positions ofthe pawl means and the clutch plate may be reversed, that is the pawlmeans may be carried by one of the members including the driven memberor the driving member and the notches may be carried by the othermember.

In the collator of the aforesaid Mestre Patent a book of sheets iswithdrawn from each sheet loaded storage pocket of the collator and isdelivered to sheet transporting means between the ends of which there isprovided stop means to halt the book of sheets. Means are provided atthis stop position to bring the sheets of the book into alined relation.While halted at this stop position, the sheets are gaged after which thecam 58 closes the stapler switch 60. Closing of this switch energizesclutch solenoid 53 which withdraws the clutch operating lever 47 fromengagement with clutch engaging lever 46 whereupon pawl 51 moves into anotch 52a to engage the clutch and the cam 36 is rotated for onerevolution. The cam operates levers 33 and 31, link 28, lever 26,stapler operating shaft 21 and pivots the stapler operating levers 17and 7 0. Depending upon which lever is in operative position withrespect to a stapler, the stapler is operated mechanically by the cam36. A book of incomplete or excess number of sheets is rejected. In theaforesaid application a stapler is provided to staple the book when thesheets are halted which stapler is solenoid operated.

The clutch 39 is of that type which disengages automatically when thedriving member 52 has made one revolution. In the clutch mechanismparticularly disclosed, when the clutch engaging lever 46 has made onerevolution, it engages the clutch operating lever 47 so that the clutchengaging lever 46 is shifted in the slot 81 whereupon the inclinedsurface 82 presses the pin 83 and pawl 51 radially outwardly to withdrawthe pawl 51 from its notch 52a on the driven member 52. This disengagesthe clutch, and the collator cycle repeats.

In the event that the book of sheets lacks one or more sheets so that itis a thin book, or has one or more extra sheets so that it is a thickbook, the gaging means responds to this condition and closes therespective parallel connected switch 67 or 68. Closing of one of theseswitches operates the reject solenoid 66 and the book is rejected bybeing deflected at the end of the transporting means so that it is notdeposited on a deposit means at the end of the transporting means.Whenever the reject solenoid 66 is operated, the non-staple switch 63 isopened which opens the circuit to the clutch solenoid 53 so that whenthe stapler switch 60 is closed, the clutch solenoid 53 is not energizedand this book is not stapled. The unstapled sheets of this rejected bookmerely requires re-distribution of each sheet in its proper storagepocket in the collator.

This invention is presented to fill a need for improvements in StaplerMechanical Operating Mechanism for Collators. it is understood thatvarious modifications in structure, as well as changes in mode ofoperation, assembly, and manner of use, may and often do occur to thoseskilled in the art, especially after benefiting from the teachings of aninvention. This disclosure illustrates the preferred means of embodyingthe invention in useful form.

I claim:

1. A mechanical stapler operating mechanism for a collator for operatinga book stapler comprising a frame, mounting means adjustably mounted onthe frame and adapted to carry a stapler, a stapler operating shaftoscilla-tably mounted on the frame, stapler lever means mounted on theoperating shaft including a first operating lever, a pivotal operatinglever pivotally mounted with respect to the first lever adapted toengage and operate a stapler and spring means oper-atively connectedbetween the first operating lever and the pivotal operating lever;Operating means operatively connected with the stapler operating shaftincluding a clutch and a linking connection between the clutch andstapler operating shaft, the clutch having a rotatable driving memberadapted to be connected with the collator and a driven member whichrotates one revolution upon engagement of the clutch, and

the linking connection operatively connecting the driven member and thestapler operating shaft to oscillate the latter including means having afixed extent of movement; and control mechanism operated by the collatorto control the clutch for engagement of the clutch once for each cycleof operation of the collator to rotate the driven member for onerevolution.

2. A mechanical stapler operating mechanism for a collator as in claim 1in which the stapler operating shaft is long, including a second stapleroperating lever mounted on the stapler operating shaft having aninclined surface to engage a stapler and adjusting means carried by eachoperating lever to adjust the position of the operating lever on thestapler operating shaft.

3. A mechanical stapler opera-ting mechanism for a collator as in claim2 in which the mounting means includes an angularly disposed holdingmeans, and in which the second operating lever includes an operatingmember angularly carried by the operating lever in alignment with theangularly disposed holding means and the inclined surface being carriedby the operating member.

4. A stapler operating mechanism for a collator as in claim 1 in whichthe clutch includes pawl means carried by one of the members includingthe driving member and the driven member and pawl notches carried by theother member, and a clutch operating lever having a pawl raising portionand oscillata'bly mounted to release and raise the pawl means to andfrom engagement with the pawl notches.

5. A stapler operating mechanism for a collator as in claim 4 in whichthe control mechanism for the clutch includes a clutch control meansmounted to engage and release the clutch operating lever, a solenoidoperatively connected with the clutch control means, and an operatingswitch electrically connected with the solenoid and operable by thecollator once for each cycle of operation of the collator,

6. A stapler operating mechanism as in claim 5 including a normallyclosed non-staple switch connected in series with the operating switchand solenoid and adapted to be opened under the control of switch meansfor a book gaging means.

7. A mechanical stapler operating mechanism as in claim 1 in which theclutch includes a clutch shaft, pawl notches carried by one member, pawlmeans pivotally mounted on the other member for engagement in the pawlnotches including at least one pawl, a clutch engaging lever mounted formovement with respect to the pawl means and engaging the pawl means tomove the same to and from engagement with the notches, and the controlmeans being operatively connected with the clutch engaging lever.

8. A mechanical stapler operating mechanism as in claim 7 includingdrive means connected with the driving member to rotate the latter aboutsix revolutions for each cycle of operation of the collator.

9. A mechanical stapler operating mechanism as in claim 1 in which theclutch includes a notched plate having notches, pawl means pivotallymounted for engagement and disengagement with the notches, a carrier forthe pawl means, one of said parts including the notched plate and thepawl means carrier being secured to the driven member and the otherbeing secured to the driving member, pawl lifting means mounted with thepawl carrier and connnected with the pawl means to engage and disengagethe latter from the notches, and clutch control means operated by thecollator to actuate the pawl lifting means once for each cycle ofoperation of the collator to engage the pawl means with the notches anddisengage the same upon one revolution of the driving member.

10. A mechanical stapler operating mechanism as in claim 9 in which theclutch control means includes a clutch solenoid, a clutch solenoidswitch electrically connected with the solenoid, and solenoid switchoperating means connected with the solenoid switch to operate the sameonce for each cycle of operation of the collator.

'11. A mechanical stapler operating mechanism as in claim 10 including areject solenoid, a non-staple switch operated by the reject solenoid,book gaging switch means electrically connected in series with thereject solenoid and adapted to be operated by book gaging means, and thenon staple switch being connected in series with the clutch solenoidswitch.

References Cited by the Examiner UNITED STATES PATENTS 2,093,689 9/1937Svenson 1409 XR 2,252,886 8/1941 Fusco 1-409 XR 3,076,196 2/1963 Mestre1-388 GRANVILLE Y. CUSTER, 111., Primary Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 3,221965 December 7 1965 Luis Mestre It is hereby certified that errorappears in the above numbered patent requiring correction and that thesaid Letters Patent should read as corrected be'low.

Column 1, lines 54 and 55, strike out "from a spool of wire, the staplermaking the staple as tor." and insert instead anism is operated througha connection with the collator.

Signed and sealed this 10th day of May 1966 iEAL) .ttest:

NEST W. SWIDER EDWARD J. BRENNER Offioer Commissioner of Patents

1. A MECHANICAL STAPLER OPERATING MECHANISM FOR A COLLATOR FOR OPERATINGA BOOK STAPLER COMPRISING A FRAME, MOUNTING MEANS ADJUSTABLY MOUNTED ONTHE FRAME AND ADAPTED TO CARRY A STAPLER, A STAPLER OPERATING SHAFTOSCILLATABLY MOUNTED ON THE FRAME, STAPLER LEVER MEANS MOUNTED ON THEOPERATING SHAFT INCLUDING A FIRST OPERATING LEVER, A PIVOTAL OPERATINGLEVER PIVOTALLY MOUNTED WITH RESPECT TO THE FIRST LEVEL ADAPTED TOENGAGE AND OPERATE A STAPLER AND SPRING MEANS OPERATIVELY CONNECTEDBETWEEN THE FIRST OPERATING LEVER AND THE PIVOTAL OPERATING LEVER;OPERATING MEANS OPERATIVELY CONNECTED WITH THE STAPLER OPERATING SHAFTINCLUDING A CLUTCH AND A LINKING CONNECTION BETWEEN THE CLUTCH ANDSTAPLER OPERATING SHAFT, THE CLUTCH HAVING A ROTATABLE DRIVING MEMBERADAPTED TO BE CONNECTED WITH THE COLLATOR AND A DRIVEN MEMBER WHICHROTATES ONE REVOLUTION UPON ENGAGEMENT OF THE CLUTCH, AND THE LINKINGCONNECTION OPERATIVELY CONNECTING THE DRIVEN MEMBER AND THE STAPLEROPERATING SHAFT TO OSCILLATE THE LATTER INCLUDING MEANS HAVING A FIXEDEXTENT OF MOVEMENT; AND CONTROL MECHANISM OPERATED BY THE COLLATOR TOCONTROL THE CLUTCH FOR ENGAGEMENT OF THE CLUTCH ONCE FOR EACH CYCLE OFOPERATION OF THE COLLATOR TO ROTATE THE DRIVEN MEMBER FOR ONEREVOLUTION.